Why am I getting the \"Fatal error: Uncaught Error: Call to undefined function mysql_connect()\" error in PHP?

Error: "Fatal error: Uncaught Error: Call to undefined function mysql_connect() "

A user encounters a "Fatal error: Uncaught Error: Call to undefined function mysql_connect()" error while attempting to connect to a MySQL server.

Explanation:

The error indicates that the "mysql_connect()" function used in the PHP code is no longer supported. This function was deprecated in PHP 5.5 and removed entirely in PHP 7.

Alternatives:

To address this error, you need to replace "mysql_connect()" with either MySQLi or PDO. Both MySQLi and PDO are modern, object-oriented interfaces for interacting with MySQL.

Using MySQLi:

Example code:

<code class="php">$mysqli = new mysqli($mysql_hostname, $mysql_username, $mysql_password, $mysql_database);</code>

Using PDO:

Example code:

<code class="php">try {
    $db = new PDO("mysql:host=$mysql_hostname;dbname=$mysql_database", $mysql_username, $mysql_password);
} catch (PDOException $e) {
    echo "Error occurred: " . $e->getMessage();
}</code>

By replacing "mysql_connect()" with MySQLi or PDO, you can establish a connection to the MySQL server and perform database operations without encountering the undefined function error.

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